Paper-testing device.



H. E. EDDY.

PAPER TESTING DEVICE. urucnxou mum D110. 1, 1909.

Patented NOV. 8, 1910.

Qwummtoz To all tvkom'it md/y'conce m: Be "it 'known that I, HOWARD E. EDDY, a

citizen ofjthej-United States, residing at Arlington, in *the'eoun ty of Baltimore and State of Maryland, have invented certain new and useful Improvements in Paper-v -Testing Devices,' -of which the following is aspeclfication.

invention'relates to strength testing "inc ration.- pe

dev1ces,*-andmore particularly to devices for testing the strength of various grades of aper, with a view to determining their 'qua ityj Testing" "machines for this purose', ash'eretofore constructed, have been eavy', lar'e, expensive and more or less complicate pieces of apparatus, for the most part, 'beyond the reach of the average consumer.-

The objects of the present invention, are. therefore, to rovide'a device of this character which s all be simple lightand compact",'*'and-Which, while cheap in price. shall atthe S'ame-time be reliable and efiicient To ,these ends my invention consists in 'the'const'ructionand combination of parts [thedial of the pressure gage.

hereinafter described, and illustrated in the accompanying drawings, in which.-

Figure .1 is a' central vertical section through the-complete device; and Flg. 2 1s a perspective vlewof the piston. showing R ferring to the drawings in detail, my

improved device comprises a block 1 and a papersup orti'ng plate 2. hinged together by means 0 the lugs 3 and 4. The plate 2 i is provided with an aperture 5, over which to the "block 1 in such a manner that the index-is provided with an interior annu ar [the apehto be tested is laid.

block constitutes, in .fa ct, the cylinder. head.

The method of attachment is preferably by a means. of screw threads as indicated "at 10. Atthe -base of these screw threads the c 1- specificationqt Letters Patent: Applieation file'd December?119092 serially. 531 ,8291 I within the hollow piston.

U N l'll'ED STATES'PATENT. OFFICE I I I shoulder in which tits :1 flat ring 11. It will be obvious that by screwing the. cylinder 10 down upon the head 1, the diaphra m 9 will begsecurely clamped between the rmg 11 and the upper surface of the block 1,

and thus secured in position. At its upper end the cylinder. 10 is provided with an inwardly projecting annular flange 12. This forms an opening of slightly less. diameter than the diameter of the cylinder, and

. ,PatentcdNovQ S, 916,

through this otpening worksthe pistonnow to be describe .By reference to Fig. 2 it will be seen. that this piston comprises a.

cylindrical body 13.. adapted to snugly fitv the opening formed by the flange 12. This cylindrical body is preferably hollow and is provided with a bottom 14, which is extended'so as to project beyond the body 13 and form an annular flange or shoulder 14 The diameter of this extended bottom is such that it will just fit the interior bore of the cylinder 10. and the edge of the shoulder 14 is provided with suitable packflange 12 overhangs the annular shoulder 9 14 and thus limit-sthe outward movement of the piston.

In order to render my testing device small, and compact, I mount the pressure gage] This pressllre gage may be of the Bourdon tube, or any other suitable type. As shown in the draw mgit comprises a casing 16, having a .centl'tlldQPGIlCllIliLf neck which 1s screw-threaded which casing is nounted the usual-curved tube 17 and suitable gearing. I

18 designates the dial of the gage which is set into the casing 16 near its upper edge, and is horizontally disposed.

In order toregister as well as indicate the amount of pressure, I preferably employ a gage having two hands, oneof which is fixed, and the other loose, on the gage shaft; As

'into the bottom 14 of the piston, and in shown in the drawing, 19 designates; the

fixed hand and 20 the loose hand. The latter carries a pin 21 which is engaged by the hand lf), when actuated. In order to're'set cover it with a transparent dome 24. which is preferably constructedof thick heavy glass, and% time; the up er ed eof the body 13 oflt %pisto n. Thispdome serves to receive the pressure from the hand of the operator and at the same time permits of the ready reading of. the gage indications,

The 0 ration of the device will be obvious. entire pylinder and piston is swun It on the'hm'ge 3 and 1 so as to permit the placing in position on the plate 2 of the sample of paper to be tested. The de- I 'agamst and finallywthrough the paper 25.

' necessary to rupture thepaper.

Acting upwardly-the pressure operates the gage causing the .hand 19 to move over the; scale and ca with it the loose hand 20.? Immediately he" paper ruptures," the plunger 6 passes downwardly throughthe same and 3bthe pressure. is relieved. 1 When, therefore,

the -')perator remo'ves his hand from the piston, 'thespring .8 will restore the parts to their normal position, and the hand 19 will return to zero, leaving the loose hand 20 at the maximum point to which it was moved, thus indicating and registering the ressure A ter this readin has been observed, the hand 20 may, be set ack to zero by manipulating the pin 22. --It will therefore be s on. that my 1mproved' paper testing-device is compact and self-contained, and may even be easily carried in the pocket and it is thought ,that the numerous a'dvanta es of my invention will be readily appreciated by'thoseskiiled in such matters. Y I

What-I claim is:- 1 1. Apa er testin'g device comprising acasing, a piston slidably mounted in one end of said casing and projecting therefrom, means at the other: end of'said casing for clamping-1a sheet of paper thereagainst, m ans for rupturing the paperao clamped,a pressure gage carried by the piston, said piston having'a transparent end through which such gage maybe read, said transparent end being adapted to receive direct pressure fromthe hand of the operator, and means for transmitting such pressure to said rupturin means. Y 1

2. n apaper testing device, a paper supporting, apertured'plate, a cylinder: having Its head hinged to said'plate and adapted to clamp the paper between itself and the plate, means carried by'the cylinder for exerting a pressure onthatl-part of the paper adjacent above the aperture in said plate, fluid pre'ssure means for actuating said plunger, and means for measuring such pressure.

4. In a paper testing device, a plate having an opening, a cylinder disposed adjacent said plate, a plunger mountedinthe head of such cylinder directly over the opening.

in said plate, an elastic diaphragm overlying the upper end of said plunger, means for exerting fluid pressure on :Said dia* phragm to cause it to actuate said plunger, and means for measuring such pressure.

5. In a paper testing device, a vertically disposed cylinder; having at its lower end means for exerting pressure upon the paper being tested, a piston in said cylinder projecting from the upperend thereof, fluid in said cylinder, and a pressure gage carried by said piston and provided witha dial and with a cover through whichsai'd dial may be read.

6. ..In a paper testing device, means for supporting the paper, and means for exertmg pressure thereon and for measuring such pressure, such last mentioned means corn-,

prising a piston having a hollow body, a I

inclosed within said iston and incommunivcation with said flui' and a glass dome fitted-in the upper end of said piston above said gage, so that the indications of said.

ing to exert pressure on said fluid, a gage gage may be read theretlirough, said dome serving to receive pressure from the,hand ,of v

the operator when the piston is, being; pressed. V 8. A paper testing device comprising a,

casing, a plunger mounted -in. oi1e-end'the 1'eof and adapted to bear against the paper being tested, means for supporting such'pap'er adjacent the plunger, a 'pistonmounted inthe other end of said casing, and adapted tojreceiy direct pressure from the hand of the t operator, fluid in said casingbetweeii said plunger and piston,"and means for indicat- I ing the resistance ,ofleredby, the paper to said'plunger. I

9. A paper testing device coinprising'a casing,w a plunger mounted in one end there 1 of'and adapted to bear against the paper being tested, means for supporting such paper adjacent the plunger, a piston mounted in and projecting from the other end of said casing, and adapted to 1' :eive direct pressure from the hand of ti; operator,

fluid in said casing between said plunger and piston, and means attached directly to and forming part of said piston forindicating the resistance offered by the paper to said plunger.

10. A paper testing-device comprising a tasing, a piston slidably mounted in one end of said casing and projecting therefrom, said piston being adapted to receive direct pressure from the hand of the operator, a

plunger mounted in the other end of said casing and adapted to bear against the paper being tested, means for clamping the paper in position, and means carried by the casing for utilizing the pressure on the piston for both operating said plunger and for actuating said clamping means, and means for registering such pressure.

In testimony whereof I afiix my signature, in presence of two Witnesses.

HOVARD E. EDDY.

'itnesses GEORGE W'ARD, ARTHUR P. MUDGE. 

